Note original artwork by George Perez and Dan Adkins was altered in the
final print version (black background and removing the artists'
signatures) for Avengers #150... and the same black background theme carried to the Arthur Adams homage cover for Avengers Assemble #1 (Variant Cover).

This is a vintage photostatic cover proof on gloss paper shot directly
from the line art in the 1970s. It measures approximately 7.25" x 11.5"
overall. Note that the background of this cover art is different than
what appears in the published version.